It seems this is what you will get when using a CATEGORICAL rather than a REGRESSION model. From the Google documentation: https://developers.google.com/prediction/docs/developer-guide#examples
When you submit a query, the API tries to find the category that most closely describes your query. In the Hello World example, the query "mucho bueno" returns the result
...Most likely: Spanish, Full results:
[
{"label":"French","score":-46.33},
{"label":"Spanish","score":-16.33},
{"label":"English","score":-33.08}
]